From fa6e10e9cec163845aa29e7940c86e9c9ab8a2bc Mon Sep 17 00:00:00 2001
From: Jordi Vilalta Prat
Date: Sun, 15 Feb 2009 06:10:59 +0000
Subject: Import the SCI engine sources from the FreeSCI Glutton branch (it
 doesn't compile yet)

svn-id: r38192
---
 engines/sci/include/util.h | 108 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 engines/sci/include/util.h

(limited to 'engines/sci/include/util.h')

diff --git a/engines/sci/include/util.h b/engines/sci/include/util.h
new file mode 100644
index 0000000000..75ec2e6706
--- /dev/null
+++ b/engines/sci/include/util.h
@@ -0,0 +1,108 @@
+/***************************************************************************
+ util.h Copyright (C) 1999,2000,01 Magnus Reftel
+
+
+ This program may be modified and copied freely according to the terms of
+ the GNU general public license (GPL), as long as the above copyright
+ notice and the licensing information contained herein are preserved.
+
+ Please refer to www.gnu.org for licensing details.
+
+ This work is provided AS IS, without warranty of any kind, expressed or
+ implied, including but not limited to the warranties of merchantibility,
+ noninfringement, and fitness for a specific purpose. The author will not
+ be held liable for any damage caused by this work or derivatives of it.
+
+ By using this source code, you agree to the licensing terms as stated
+ above.
+
+
+ Please contact the maintainer for bug reports or inquiries.
+
+ Current Maintainer:
+
+    Christoph Reichenbach (CR) <jameson@linuxgames.com>
+
+***************************************************************************/
+
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <stdlib.h>
+#include <stdio.h>
+
+/* An excercise in bloated macro writing ;-)*/
+
+/*Declare a flexarray type*/
+#define FLEXARRAY(type, extra) struct{\
+	type* data;\
+	int used, size, itemsize;\
+	extra\
+}
+
+/* [DJ] Declare a flexarray type without extra fields - Visual C++ complains
+** when the FLEXARRAY macro is used and extra parameter is not specified
+*/
+#define FLEXARRAY_NOEXTRA(type) struct{\
+	type* data;\
+	int used, size, itemsize;\
+}
+
+/*Initialize a flexarray*/
+#define FLEXARRAY_INIT(type, array) do {(array).itemsize=sizeof(type); (array).size=0; (array).used=0;} while(0)
+
+/*Prints an error message and returns (from the function using the macro)*/
+#define FLEXARRAY_PANIC(message, errorcode) do{\
+	fprintf message;\
+	errorcode;\
+} while(0)
+
+/*Use if the state of the array is incnsistent*/
+#define FLEXARRAY_PANIC_BADSTATE(array, errorcode) FLEXARRAY_PANIC((stderr, "PANIC: flexarray "#array" is in an inconsistent state (%d,%d).\n", (array).used, (array).size), errorcode)
+
+/*Use if memory allocation fails*/
+#define FLEXARRAY_PANIC_MEMORY(array, bytes, errorcode) FLEXARRAY_PANIC((stderr, "PANIC: Unable to allocate %d bytes for flexarray"#array"\n", bytes), errorcode)
+
+/*Allocates an initial array*/
+#define FLEXARRAY_ALLOCATE_INITIAL(type, array, errorcode) do{\
+	(array).data= (type*)sci_malloc(4*(array).itemsize);\
+	if((array).data==0) FLEXARRAY_PANIC_MEMORY(array, 4*(array).itemsize, errorcode);\
+	(array).size=4;\
+	(array).used=0;\
+} while(0)
+
+/*Doubles the size of the allocated area*/
+#define FLEXARRAY_RESIZE(type, array, errorcode) do{\
+	int size=(array).size*2*(array).itemsize;\
+	(array).data= (type*)sci_realloc((array).data, size);\
+	if((array).data==0) FLEXARRAY_PANIC_MEMORY(array, size, errorcode);\
+	(array).size*=2;\
+} while(0)
+
+/*Appends /value/ at the end of the array, resizing as necessary*/
+#define FLEXARRAY_APPEND(type, array, value, errorcode) do\
+{\
+	if((array).used>=(array).size)\
+	{\
+		if((array).size==0) FLEXARRAY_ALLOCATE_INITIAL(type, array, errorcode);\
+		else {\
+			if((array).used==(array).size) FLEXARRAY_RESIZE(type, array, errorcode);\
+			else FLEXARRAY_PANIC_BADSTATE(array, errorcode);\
+		}\
+	}\
+	(array).data[(array).used++]=(value);\
+}while(0)
+
+/*Adds space for a value at the end of the array, resizing as necessary, but
+ *does not initialize the value*/
+#define FLEXARRAY_ADD_SPACE(type, array, items, errorcode) do{\
+	if((array).used+items>(array).size)\
+	{\
+		if((array).size==0) FLEXARRAY_ALLOCATE_INITIAL(type, array, errorcode);\
+		else if((array).used==(array).size) FLEXARRAY_RESIZE(type, array, errorcode);\
+		else FLEXARRAY_PANIC_BADSTATE(array, errorcode);\
+	}\
+	(array).used++;\
+} while(0)
+
+#endif
-- 
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